Re: [CAD_CAM_EDM_DRO] Re: PID setting in EMC

I am also using the Gecko G340 drive with some rather large servos. I have only tried steppermod so far, and it seems to work ok. I agree that there may be some issue with uneven pulse trains.
On a side note about the Gecko G340 and larger motors, where do you have your gain and damping pots set to? My motors go into bad vibrations unless I have the gain set very low, with the damping set just above it. I understand why you would get vibrations or oscillations if the drive was underdamped, but I also get it when it is overdamped. Is having the gain pot set to almost minimum ok?
Richard

dakota8833 wrote:--- In CAD_CAM_EDM_DRO@y..., "Brent Fuchs"
wrote:

> Evening,
>
> I am using EMC with geco 340 drives and 600oz in dc servo motors to

control

> my router table. I am currently bench testing the system and having

difficultly

> with the PID settings in the emc.ini file. does anyone have any base

line setting

> to get me pointed in the right direction? Is it even possible to get

the correct setting

> on the bench with no resistance on the motors?
> any help would be apreciated.
>
> Thank you
> brentf1
>
>
> [Non-text portions of this message have been removed]

I run EMC in steppermod , as I use Geckos , they take care of PID.
There was some talk about steppermod outputting a ragged pulse train,
but unless you're running at a very low resolution you will never
notice it.
My router/mill is 2000 an inch and is smooth in movement.

What is the benefit of freqmod.o if your controler has PID ?

Frank


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